UNT Libraries Government Documents Department - 228 Matching Results

Search Results

open access

Cathode Sputtering Problems

Description: The question of the nature and charge of the metallic particles emitted in cathode sputtering has been answered experimentally: the particles are primarily neutral atoms. The proof was obtained from the moving particles themselves by a new "spectroscopic method of vapor pressure measurement" in combination with a "vapor pressure measurement from coating density."
Date: unknown
Creator: Von Hippel, Arthur R. |(Arthur Robert), 1898-2003.
open access

Chemical Reactions by Neutron-Capture (Szilard-Chalmers Effect)

Description: With the energies of nuclear reactions being superior by several orders of magnitude to those of chemical reactions, the nature of the chemical bond can be expected to influence the rate of nuclear reactions in only rare cases. Rather than discuss those chemical reactions the paper focuses on chemical reactions in which the atom under study undergo both nuclear and chemical reactions.
Date: unknown
Creator: Broda, Engelbert
open access

The Chloride of Praseodymium

Description: Praseodymium chloride has been prepared in the form of large green crystals. In order to prepare praseodymium oxide in the pure state, the author precipitated the oxalate from a nitric solution instead of a hydrochloric solution.
Date: unknown
Creator: Matignon, Camille
open access

Concerning the Quenching of the Fluorescence of Chlorophyll and Magnesium Phthalocyanin and the Interaction of These Pigments with the Quenching Substance

Description: An investigation of the quenching of fluorescence of dyestuffs (pigments) by other molecules will clarify the nature of the photochemical effect exerted by dyestuffs in general and chlorophyll in particular.
Date: unknown
Creator: Evstigneyev, V. B.; Gavrilova, V.A. & Krasnovskiĭ, A. A. (Aleksandr Abramovich), 1913-
open access

Contribution to the Problem Concerning the Surface Conductivity of Solid Dielectrics

Description: A study was made of the surface conductivity of glass, quartz, mica, nitrofilm, polymers, methyl-metacrylate, styrene, isobutylene, high-molecular paraffin. The conductivity was studies for the purpose of determining the number of ions found on the surface of a dielectric, which is necessary for the study of the iono-heterogeneous catalysis.
Date: unknown
Creator: Chirkov, N.
open access

The Counting Efficiency of Counter Tubes with Aluminum, Copper and Gold Cathodes for X-Rays in the Range 5 Kev to 60 Kev

Description: The author's measurement using counting tubes were performed with an X-ray beam, produced by an X-ray tube. The X-ray beam impinges on only a very small part of the counting tube. In this work the counting efficiency of counting tubes with A1-Cu- and Au-cathodes is determined for X-radiation in the range 5 Kev to 60 Kev.
Date: 1950
Creator: Moses, Alfred J. & Saurer, Hans
open access

Counting Tubes Containing Added Vapor

Description: Oscillograms are used to show the time variation of the discharge in ordinary (air or argon-filled) counting tubes, and to show the decisive effect of small admixtures of other gases on the discharge. Various vapors are investigated for use in counting tubes. Hints for the construction of counting tubes are given; the nature and cause of the temperature effect in counting tubes is discussed briefly.
Date: unknown
Creator: Trost, Adolf
open access

The Diffusion of the Impurity Elements in Technical Iron into Solid Iron

Description: The diffusion of carbon in solid iron has been the subject of numerous investigations over since the middle of the 19th century. Little has been published on the diffusion of the other technically important impurities present in iron. The purpose of this investigation is to help shed light on diffusion phenomena in iron. The work was performed in 1919 at the Metallurgical Institute of the Technische Hochschule in Breslin
Date: unknown
Creator: Fry, Adolf
open access

The Distribution of Energy at the Cathode of a Glow Discharge

Description: The anodes of a mercury vapor rectifier are the cathodes for the current in the so-called "non-conducting direction." If the voltage is sufficient, a glow discharge occurs in the on-conducting direction. It is of considerable practical importance to know how much energy this glow discharge carries over to the cathodes.
Date: unknown
Creator: Gunther-Schulze, A.
Back to Top of Screen